Hey asilvester635.

For calculus, you differentiate once and twice and solve for dy/dx = 0 and then check the sign of d^2y/dx^2 to see if its positive or negative.

Can you calculate the two derivatives (1st and 2nd) and solve for dy/dx = 0 and for those particular values of x (or (x,y) pairs), show what d^2y/dx^2 is for those values?